To be born again, or to experience the new birth, is a phrase, particularly in evangelical Christianity, that refers to a "spiritual rebirth", or a regeneration of the human spirit. In contrast to one's physical birth, being "born again" is distinctly and separately caused by the operation of the Holy Spirit, and it occurs when one is baptized in water (as in John 3:5 and Titus 3:5). While all Christians are familiar with the concept from the Bible, it is a core doctrine of the denominations of the Anabaptist, Moravian, Methodist, Baptist, Plymouth Brethren and Pentecostal churches along with evangelical Christian denominations. These churches stress Jesus's words in the Gospels: "Do not be astonished that I said to you, 'You must be born from above.'" (John 3:7). Their doctrines also hold that to be "born again", and thus "saved", one must have a personal and intimate relationship with Jesus Christ.
The term born again has its origin in the New Testament. In the First Epistle of Peter, the author describes the new birth as taking place from the seed which is the Word of God. In the Gospel of Luke, Jesus himself refers to the Word of God as the seed.